Campbell Biology: Concepts and Connections
Campbell Biology: Concepts and Connections
10th Edition
ISBN: 9780135269169
Author: Taylor
Publisher: PEARSON
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Chapter 3, Problem 18TYK

Enzymes usually function best at an optimal pH and temperature. The following graph shows the effectiveness of two enzymes at various temperatures.

Chapter 3, Problem 18TYK, Enzymes usually function best at an optimal pH and temperature. The following graph shows the

a. At which temperature does enzyme A perform best? Enzyme B?

b. One of these enzymes is found in humans and the other in thermophilic (heat-loving) bacteria. Which enzyme would you predict comes from which organism?

c. From what you know about enzyme structure, explain why the rate of the reaction catalyzed by enzyme A slows down at temperatures above 40°C (140°F).

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